Drill



, Patented Oct. II, |898.

T. W. GRAY.

DRILL.

(Application led Sept, 24, 1897.)

(No Model.)

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W/TNESSES J A TTOHNE Y S.

UNITED STAT-ns THOMAS W". GRAY, OF PEOLI, OHIO.V

DRILL.

SREGIFICATION forming part of Letters Patent No. 612,329, dated October 1 1, 1898. Appncatanneaseptemb.. 24,1897. serial No. 652,860. (roman.)

To all whom, it may concern:

Be it known that I, THOMAS W. GRAY, of Peoli, in the county of Tuscarawas and State of Ohio, have invented a new and Improved Drill, of which the following is a full, clear, and exact description.

The invention relates to mining-drills and its object is to provide a new and improved,

drill which is simple and durable in construction, very edective in operation, easily and quickly set up in a mine-shaft, and arranged to enable a miner to drill a hole in any desired direction.

The invention consists of certain parts and details and combinations of the same, as will be fully described hereinafter, and then pointed out in the claim.

Reference is to be had to the accompanying drawings, forming a part of this specification', in which similar characters of reference indicate corresponding parts in all the gures.

Figure l is a side elevation of the improvement. Fig. 2 is a sectional plan view of the same on the line 2 2 of Fig. 1. Fig. 3 is a transverse section of the same on the line 3 3 of Fig. 1. Fig. 4L is an enlarged sectional plan view of the handle and its locking device, the section being taken on the line 4 4 of Fig.` l; and Fig. 5 is an enlarged sectional side-elevation of the trnnnion-box on the line 5 5 of Fig. 2.

The improved drill is provided with a boxframe A, in the upper end of which screws a pin B for engagement at its point with the ceiling or roof of the mine in which the device is to be used. In the sides of the frame A are formed parallel guideways A', in which are fitted to slide the sides of an, extensionframe C, carrying at its lower end a point B' for engagement with the door of the mineshaft.

VOn the forward faces of the sides of the extension-frame C are arranged ratchet-teeth C' C2, adapted to be engaged by dogs D D', respectively secured on shafts E E', respectively mounted to turn in suitable bearings in the lower end of the main frame A. The dogs D D' are provided with gear-teeth D2 D3, respectively in mesh with each other, so that the said dogs move in unison in and out of engagement with the ratchet-teeth C' C2. The outer square end of the shaft E is adapted to be engaged by a suitable crank-arm or other device for turning the shaft and moving the dogs D D' simultaneously in and out of engagement upon moving the extension-frame outward or inward, as the case may be. A spring D4 presses against the dogs D D' to hold the same forwardly in an outermost position*t-hat is, in engagement with the ratchet-teeth C' C2.

Now when it is desired to set the machine up in a mine the frame A is moved with its point B in engagement with the top of the mine-shaft, and the shaft E is turned to move the dogs D D' outof engagement with the ratchet-teeth C C? to allow of sliding the extension-frame O downward until the point B' is in contact with the floor ofthe mine-shaft. The dogs D D' now engage corresponding teeth O' C2, and then the operator turns the point B so as to screw the same outward in the upper end of the frame A to securely fasten the frame in position in the mine-shaft.V

On the edges of the sides of the main frame A and the extension-frame C are formed inclined notches A2 and C3, respectively adapted to be engaged by trunnions F',projecting from the sides of a box F, having a hinged lid F2 and containing a feed-nut F3, into which screws a feed-spindle G, supporting in its socket a bit H, and adapted to receive at the other end a crank-arm I for turning the feedspindle to drill a hole into the material by the bit H.

The feed-spindle G is provided with longitudinally-extending grooves G', engaged by keys or lugs formed on the inside of a beveled gear-Wheel J, in mesh with a beveled gear-wheel K, secured on a shaft K', journaled in a bearing F4, projecting from the outer end of the box F. On the shaft K' is secured a iiy-wheel K2, so that when the spindle G is turnedthe beveled gear-wheel J rotateswith it and imparts a rotary motion by the gear-wheel Kto the shaft K' and the flywheel K2 to insure a steady drilling `motion of the bit H.

It is understood that the feed-spindle G moves outward upon being rotated by screwing in the nut F3, the feed-spindle sliding loosely in the beveled gear-wheel J, held in place by the beveled gear-Wheel K. A larger gear-wheel J is formed or secured on the IOO gear-Wheel J and is in mesh With a beveled pinion L, secured on a shaft L', journaled in a bearing F5, likewise attached to or formed on the box F. The outer square end of the shaft L is adapted to receive a crank I for enabling a miner to turn the said shaft L and impart a slouT rotary motion to the gear- Wheels .I J', and consequently to the feedspindle G, to feed the bit IfI slowly into material of a hard nature. Thus the same crank I can be used on the spindle G or on the shaft.

swung with its trunnions in the bearings in the notches A2 and O3 until the desired posi tion is reached. I-Iaving thus fully described my invention, I claim as new and desire to secure by Letters Patent- In a drill, a frame, comprising two sectionsh sliding one upon the other, one of the sections being provided With ratchet-teeth, dogs mounted in the sections of the frame Without teeth and engaging the said ratchet-teeth of the section, said dogs being provided With gear-teeth meshing With each other and the shaft of one of the dogs being extended to receive a crank, and a spring for holding said dogs in engagement with the ratchet-teeth, substantially as described.

THOMAS W. GRAY.

Vitnesses:

JOHN GRAY, FRANK S. RIPLEY. 

